<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<table border="1">
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
		<tr>
			<td>999</td>
			<td>999</td>
			<td>999</td>
			<td>999</td>
		</tr>
	</table>

	jq  是 js 函数库

	选择器  （捉标签）

	Document.getElementsByClassNmme('box')[0].Document.getElementsByClassNmme('item')[0].Document.getElementsByTagNmme('a')[0];

	$('.box .item  a').eq(3)

	筛选  (进行一步确实标签)

	事件


	$('.item').click(function(){
		
	});

	css 

	属性

	文档处理 


	效果

	ajax(异步);




</body>
</html>